president obama has chosen a new leader for the internal revenue service. the nominee-- announced today-- is john koskinen, a retired corporate and government official who's managed a number of organizations in crisis. the i.r.s. has been under fire for singling out tea party groups and others for extra scrutiny when they seek tax- exempt status. on wall street, upbeat reports on manufacturing in china and the u.s. drove stocks to new highs. the s&p 500 closed above 1700 for the first time. the dow jones industrial average gained 128 points to close at 15,628. the nasdaq rose 49 points to close at 3,675. those are some of the day's major stories. now, back to judy. >> woodruff: and we pick up on the continuing fallout from the revelations of former n.s.a. contractor edward snowden. last night we debated the role of the foreign surveillance intelligence court which approves the government's requests to gather intelligence information on americans. tonight, we have a conversation with three former n.s.a. officials: a former inspector general and two n.s.a. ve